CN211180170U - Analog partial discharge pulse generator for on-site partial discharge verification - Google Patents
Analog partial discharge pulse generator for on-site partial discharge verification Download PDFInfo
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- CN211180170U CN211180170U CN201922155895.7U CN201922155895U CN211180170U CN 211180170 U CN211180170 U CN 211180170U CN 201922155895 U CN201922155895 U CN 201922155895U CN 211180170 U CN211180170 U CN 211180170U
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Abstract
The utility model provides a pulse generator is put in simulation office for check-up is put in on-the-spot office, including power, power boost module, stepping return circuit module, polarity switching module, relay, phase place synchronizing signal input module, synchronous circuit, oscillation circuit, standard capacitance; the power supply, the power supply boosting module, the stepping loop module and the polarity switching module are sequentially connected, the phase synchronization signal input module, the synchronization circuit and the oscillation circuit are sequentially connected, the polarity switching module and the oscillation circuit are respectively connected with the relay, and the output end of the relay is connected with one end of the standard capacitor; the output end of the relay and the other end of the standard capacitor are respectively used as the negative pole and the positive pole of the output end of the analog partial discharge pulse generator. The utility model provides a pulse generator is put in simulation office's output amplitude can reach 40dB and the gear is optional, and the flow of on-the-spot check-up is simplified in maximization, only needs to switch the output impedance of different grade type, can realize putting, the check-up that test system was put in high frequency office and ultrasonic wave office to ground electric wave office.
Description
Technical Field
The utility model relates to an electrical overhaul field, more specifically relates to a pulse generator is put in simulation office that is used for check-up is put in on-the-spot office.
Background
With the rapid development of domestic power system construction, the laying range and the number of the cable lines of both the ultrahigh-voltage cable and the medium-high voltage distribution network are developed at an exponential growth speed. In the cable design and laying process, insulation defects are inevitably left, and after long-term live operation, a series of insulation breakdown accidents can gradually happen to cable lines, so that power failure accidents are caused, and normal production and life of people are seriously influenced.
The partial discharge detection technology, as a detection means capable of effectively predicting the insulation defect of the cable line, gradually becomes an important daily maintenance work content developed by related operation and maintenance departments.
However, since the partial discharge detection apparatus is generally composed of electronic components, the electronic components (especially, amplifiers) are inevitably shifted after a long time use, resulting in deviation of the detected values, and when the deviation is larger than the test range, an invalid test (false test) is caused, failing to achieve the expected effect of preventing the insulation failure.
Further, the inventor uses more handheld partial discharge testers, and the testers can realize partial discharge detection of different frequency components along with replacement of different types of partial discharge sensors.
The invention aims to solve the problem that the partial discharge tester cannot be quickly checked in the field, and simultaneously solve the problem of frequency-selective output of different types of sensors with different detection signal frequencies.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of low efficiency in the partial discharge detection among the prior art, the utility model provides a pulse generator is put in simulation office that is used for on-the-spot office to put the check-up.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a simulation partial discharge pulse generator for on-site partial discharge verification comprises a power supply, a power supply boosting module, a stepping loop module, a polarity switching module, a relay, a phase synchronization signal input module, a synchronization circuit, an oscillation loop and a standard capacitor; the power supply, the power supply boosting module, the stepping loop module and the polarity switching module are sequentially connected, the phase synchronization signal input module, the synchronization circuit and the oscillation circuit are sequentially connected, the polarity switching module and the oscillation circuit are respectively connected with the relay, and the output end of the relay is connected with one end of the standard capacitor; the output end of the relay and the other end of the standard capacitor are respectively used as the negative pole and the positive pole of the output end of the analog partial discharge pulse generator.
The working principle of the utility model is as follows: the power supply generates a higher direct current voltage through the power supply boosting module, the higher direct current voltage is output in a grading way through the grading loop module, then the polarity is switched to meet the requirement of outputting the polarity, and the analog pulse signal is output by controlling the action of the mercury relay and matching with the standard capacitor. If the pulse signal is expected to have the phase characteristic of power frequency partial discharge, a power frequency phase signal can be obtained by the power system and input to the synchronous circuit, so that the oscillating circuit carries out synchronous control to enable the relay to synchronously act.
In a preferred embodiment, the relay is a mercury relay.
In a preferred scheme, the device further comprises a shell, wherein the shell comprises an output port, a generator main body and a control output button; the analog partial discharge pulse generator is arranged in the generator main body, the control output button is connected with the grading loop module, and the output port is connected with two poles of the output end of the analog partial discharge pulse generator.
In a preferred scheme, the control output button is a click button, an analog signal is started to be output when the button is pressed, and the signal is stopped to be output when the button is released.
In a preferred embodiment, the control output buttons include a 40dB control output button and a 20dB control output button.
In a preferred embodiment, the output port is a BNC port.
In a preferred scheme, the output end of the analog partial discharge pulse generator is in short circuit, and simultaneously passes through a high-frequency pulse current output coil to form a high-frequency current loop, and a partial discharge sensor HFCT is arranged on an output coil to detect a signal generated by the analog partial discharge pulse generator; by changing the amplitude of the output signal, the field partial discharge test equipment can be verified.
In a preferred scheme, one end of an output port of the analog partial discharge pulse generator is sequentially connected with the low-pass filtering and detecting circuit and the metal flat plate, and the other end of the output port of the analog partial discharge pulse generator is connected with the metal flat plate to form a loop; the earth electric wave partial discharge sensor is arranged on the metal flat plate and used for detecting a signal generated by the analog partial discharge pulse generator; by changing the amplitude of the output signal, the field partial discharge test equipment can be verified.
In a preferred scheme, one end of an output port of the analog partial discharge pulse generator is sequentially connected with a band-pass filtering, amplifying and detecting loop and a sound generator, and the other end of the output port of the analog partial discharge pulse generator is connected with the sound generator to form a loop; the ultrasonic partial discharge sensor is arranged on the sound wave generator and detects a signal generated by the analog partial discharge pulse generator; by changing the amplitude of the output signal, the field partial discharge test equipment can be verified.
In a preferred embodiment, the size of the metal plate is 40 x 15 cm.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:
the utility model provides a signal frequency that pulse generator can export is put in simulation office for check-up is put in on-the-spot office is 20kHz-100MHz, and the amplitude can reach 40dB and the gear is optional, and the flow of on-the-spot check-up is simplified in maximization, only needs to switch the output impedance of different grade type, can realize putting, the check-up that test system was put in high frequency office and ultrasonic wave office to earth's electric wave office.
Drawings
Fig. 1 is a schematic block diagram of a simulated partial discharge pulse generator for on-site partial discharge verification according to the present invention;
fig. 2 is a schematic diagram of a simulated partial discharge pulse generator of embodiment 2 adapted to a high-frequency pulse current output coil for verification;
fig. 3 is a schematic diagram illustrating the verification of the output impedance of the analog partial discharge pulse generator to ground wave signal in embodiment 2;
fig. 4 is a schematic diagram of the analog partial discharge pulse generator and the ultrasonic transducer in the embodiment 2 for verification.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
Example 1
An analog partial discharge pulse generator for on-site partial discharge verification, as shown in fig. 1, comprises a power supply, a power supply boosting module, a stepping loop module, a polarity switching module, a relay, a phase synchronization signal input module, a synchronization circuit, an oscillation loop and a standard capacitor; the power supply, the power supply boosting module, the stepping loop module and the polarity switching module are sequentially connected, the phase synchronization signal input module, the synchronization circuit and the oscillation circuit are sequentially connected, the polarity switching module and the oscillation circuit are respectively connected with the relay, and the output end of the relay is connected with one end of the standard capacitor; the output end of the relay and the other end of the standard capacitor are respectively used as the negative pole and the positive pole of the output end of the analog partial discharge pulse generator.
The working principle of the utility model is as follows: the power supply generates a higher direct current voltage through the power supply boosting module, the higher direct current voltage is output in a grading way through the grading loop module, then the polarity is switched to meet the requirement of outputting the polarity, and the analog pulse signal is output by controlling the action of the mercury relay and matching with the standard capacitor. If the pulse signal is expected to have the phase characteristic of power frequency partial discharge, a power frequency phase signal can be obtained by the power system and input to the synchronous circuit, so that the oscillating circuit carries out synchronous control to enable the relay to synchronously act.
In a preferred scheme, the relay is a mercury relay, the time for closing the switch of the mercury relay is 10ns at the minimum, namely the rising edge time of a switching pulse waveform which can be generated by the mercury relay can reach 10ns theoretically-8s, the reciprocal of time is the frequency, namely 100 MHz; in the same way, the closing time of the mercury relay is 50us at most, 5 x 10-5s, i.e. a frequency of 20 kHz.
Example 2
A simulation partial discharge pulse generator for on-site partial discharge verification comprises a power supply, a power supply boosting module, a stepping loop module, a polarity switching module, a relay, a phase synchronization signal input module, a synchronization circuit, an oscillation loop and a standard capacitor; the power supply, the power supply boosting module, the stepping loop module and the polarity switching module are sequentially connected, the phase synchronization signal input module, the synchronization circuit and the oscillation circuit are sequentially connected, the polarity switching module and the oscillation circuit are respectively connected with the relay, and the output end of the relay is respectively connected with one end of the standard capacitor; the output end of the relay and the other end of the standard capacitor are respectively used as the negative pole and the positive pole of the output end of the analog partial discharge pulse generator.
In a preferred embodiment, the relay is a mercury relay.
The working principle of the utility model is as follows: the power supply generates a higher direct current voltage through the power supply boosting module, the higher direct current voltage is output in a grading way through the grading loop module, then the polarity is switched to meet the requirement of outputting the polarity, and the analog pulse signal is output by controlling the action of the mercury relay and matching with the standard capacitor. If the pulse signal is expected to have the phase characteristic of power frequency partial discharge, a power frequency phase signal can be obtained by the power system and input to the synchronous circuit, so that the oscillating circuit carries out synchronous control to enable the relay to synchronously act.
In a preferred scheme, the device further comprises a shell, wherein the shell comprises an output port, a generator main body and a control output button; the analog partial discharge pulse generator is arranged in the generator main body, the control output button is connected with the grading loop module, and the output port is connected with two poles of the output end of the analog partial discharge pulse generator.
In a preferred scheme, the control output button is a click button.
In a preferred embodiment, the control output buttons include a 40dB control output button and a 20dB control output button.
In a preferred embodiment, the output port is a BNC port.
In a preferred scheme, as shown in fig. 2, the output end of the analog partial discharge pulse generator is short-circuited, and simultaneously passes through the high-frequency pulse current output coil 1 to form a high-frequency current loop, and the partial discharge sensor is arranged on the output coil to detect a signal generated by the analog partial discharge pulse generator; by changing the amplitude of the output signal, the field partial discharge test equipment can be verified.
In a preferred embodiment, as shown in fig. 3, one end of the output port of the analog partial discharge pulse generator is sequentially connected to the low-pass filter and detector circuit and the metal plate 22, and the other end is connected to the metal plate 22 to form a loop; the earth electric wave partial discharge sensor is arranged on the metal flat plate 22 to detect signals generated by the analog partial discharge pulse generator; by changing the amplitude of the output signal, the field partial discharge test equipment can be verified.
In a preferred scheme, as shown in fig. 4, one end of the output port of the analog partial discharge pulse generator is sequentially connected with a band-pass filtering, amplifying and detecting loop and a sound generator 3, and the other end is connected with the sound generator 3 to form a loop; the ultrasonic partial discharge sensor is arranged on the sound generator 3 and detects a signal generated by the analog partial discharge pulse generator; by changing the amplitude of the output signal, the field partial discharge test equipment can be verified.
In a preferred embodiment, the size of the metal plate 2 is 40 × 15 cm.
The terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An analog partial discharge pulse generator for on-site partial discharge verification is characterized by comprising a power supply, a power supply boosting module, a stepping loop module, a polarity switching module, a relay, a phase synchronization signal input module, a synchronization circuit, an oscillation loop and a standard capacitor; the power supply, the power supply boosting module, the stepping loop module and the polarity switching module are sequentially connected, the phase synchronization signal input module, the synchronization circuit and the oscillation circuit are sequentially connected, the polarity switching module and the oscillation circuit are respectively connected with the relay, and the output end of the relay is connected with one end of the standard capacitor; the output end of the relay and the other end of the standard capacitor are respectively used as the negative pole and the positive pole of the output end of the analog partial discharge pulse generator.
2. An analog partial discharge pulse generator for use in field partial discharge verification as claimed in claim 1 wherein said relay is a mercury relay.
3. The analog partial discharge pulse generator for in-situ partial discharge verification according to claim 1, further comprising a housing, said housing comprising an output port, a generator body, a control output button; the analog partial discharge pulse generator is arranged in the generator main body, the control output button is connected with the grading loop module, and the output port is connected with two poles of the output end of the analog partial discharge pulse generator.
4. An analog partial discharge pulse generator for in-situ partial discharge verification as claimed in claim 3 wherein said control output button is a jog button.
5. The analog partial discharge pulse generator for use in field partial discharge verification according to claim 4, wherein said control output buttons comprise a 40dB control output button and a 20dB control output button.
6. The analog partial discharge pulse generator for use in field partial discharge verification according to claim 5, wherein said output port is a BNC port.
7. An analog partial discharge pulse generator for in-situ partial discharge verification according to claim 3, wherein the output terminal of the analog partial discharge pulse generator is short-circuited and passes through the high frequency pulse current output coil (1) to form a high frequency current loop, and the partial discharge sensor is disposed on the output coil to detect the signal generated by the analog partial discharge pulse generator.
8. The analog partial discharge pulse generator for in-situ partial discharge verification according to claim 3, wherein one end of the output port of the analog partial discharge pulse generator is sequentially connected with the low-pass filter and detector circuit and the metal plate (2), and the other end is connected with the metal plate (2) to form a loop; a ground electric wave partial discharge sensor is arranged on the metal flat plate (2) to detect a signal generated by the analog partial discharge pulse generator.
9. The analog partial discharge pulse generator for on-site partial discharge verification according to claim 3, wherein one end of the output port of the analog partial discharge pulse generator is sequentially connected with the band-pass filtering, amplifying and detecting loop and the acoustic wave generator (3), and the other end is connected with the acoustic wave generator (3) to form a loop; the ultrasonic partial discharge sensor is arranged on the sound generator (3) and detects a signal generated by the analog partial discharge pulse generator.
10. An analog partial discharge pulse generator for in-situ partial discharge verification according to claim 8, characterised in that the size of the metal flat plate (2) is 40 x 15 cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922155895.7U CN211180170U (en) | 2019-12-04 | 2019-12-04 | Analog partial discharge pulse generator for on-site partial discharge verification |
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| CN201922155895.7U CN211180170U (en) | 2019-12-04 | 2019-12-04 | Analog partial discharge pulse generator for on-site partial discharge verification |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736049A (en) * | 2020-08-05 | 2020-10-02 | 广东电网有限责任公司 | Generator for simulating partial discharge signal |
| CN112649778A (en) * | 2020-12-18 | 2021-04-13 | 广东电网有限责任公司中山供电局 | High-performance stable partial discharge pulse generator |
| CN114281014A (en) * | 2021-11-17 | 2022-04-05 | 欧尚元(天津)有限公司 | Control method and device for field device program-controlled reflux ratio |
-
2019
- 2019-12-04 CN CN201922155895.7U patent/CN211180170U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736049A (en) * | 2020-08-05 | 2020-10-02 | 广东电网有限责任公司 | Generator for simulating partial discharge signal |
| CN112649778A (en) * | 2020-12-18 | 2021-04-13 | 广东电网有限责任公司中山供电局 | High-performance stable partial discharge pulse generator |
| CN114281014A (en) * | 2021-11-17 | 2022-04-05 | 欧尚元(天津)有限公司 | Control method and device for field device program-controlled reflux ratio |
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